Thread: Inequalities

Okay, så I'm having some troubles with these:

cos(a) > 0,62 [0;360]degrees

-0,56 < cos(a) < -0,14 [0;360]degrees

(a stands for angle)

It just says solve these inequations. How am I supposed to do this?

Originally Posted by No Logic Sense

Okay, så (btw do you use a swedish keynoard?) I'm having some troubles with these:

cos(a) > 0,62 [0;360]degrees

-0,56 < cos(a) < -0,14 [0;360]degrees

(a stands for angle)

It just says solve these inequations. How am I supposed to do this?

1. Draw rough sketches of the graphs (see attachments)

2. Use your calculator to get the (more or less) exact values of a.